FINSA will produce any bag with any length and diameter, either with both sides open or with one side closed by a disc, by sewing or a hanging piece.
Bags may need metallic protective O-rings to prevent inter-contact or to assure sealing.
Needlefelts used by FINSA have one face treated, allowing for better dust cleaning by shaking or air-pulsing.

There are special qualities available for high temperatures, hydrolysing and chemical resistant as well as those equipped with membranes.